Adding data using .CSV file in java

As we know, an excel file is a spreadsheet which represents our data in tabular form ( an intersection of row and column). We all add our database tables in our java programs using JDBD and ODBC ( a bridge) between Java (a high level language) and a RDBMS ( a Structured Query Language). If you want to know the database connectivity in java then go my blog JDBC-ODBC Connectivity using Java. But in this block I am going to educate you people, How we can use data of excel file in our java program.

To use an excel file in java first we have to convert it in a .CSV (comma separated values) file.

You all must be knowing the creation of excel file and entering data like

This is an excel spreadsheet. Now to convert it in .csv file, we have to save this file with an extension as .csv like as follows :-

After saving an excel file in .csv extension. We can open this file using simple notepad also which will show the comma separated file which further we can us in java by using bufferreader class. When you open your .csv file with an editor like notepad it will looks like :- 

 

Which is a simple comma separated flat file. Now write a program to read this text file in java,C, C++ any language of your choice.

I am including code in java for reading a simple .csv file.

Country.java

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

class CSVReader {

    public static void main(String[] args) {

        String csvFile = "country.csv";

        String line = "";

        String cvsSplitBy = ",";

        try (BufferedReader br = new BufferedReader(new FileReader(csvFile))) {

            while ((line = br.readLine()) != null) {

                // use comma as separator

                String[] country = line.split(cvsSplitBy);

                System.out.println("Country [code= " + country[0] + " , name=" + country[1] + "]");

            }

        } catch (IOException e) {

            e.printStackTrace();

        }     }

}

Now compile it an run this file and got the result like :-

I am sure this blog will help you.